COMIC-BOOK CREDENTIALS: First appeared in Batman #1 in 1940 and has since become the greatest Batman villain ever!!!! If you don't know who he is then chances are that either a.) you're dead, b.) you're an idiot or c.) you're a dead idiot.
COMIC-BOOK WEAKNESSES: He has to play second fiddle to Batman... all the time! SKILLS/ABILITIES: Is connected to the criminal underworld, knows exactly how to push Batman's buttons, looks great in purple and has the perfect smile! He also knows exactly how to put a smile on the face of others - by using Smilex gas!
REASON FOR RECRUITMENT:
Although the Joker is technically a maniacal loon, he's actually extremely clever and has always got a plan up his sleeve (alongside a deadly deck of playing cards). The Joker is also the #1 bad guy and so if he wasn't in the team then he'd probably kill every member and set up his own group. Admittedly if he did set up his own group he'd probably kill them too... but that's just his wacky way of doing things! Look, it's better to have him on the team than to not include him at all. Plus his CV includes such highlights as... 'crippled Batgirl', 'beaten Robin to death' and 'made a load of fish quite happy'. That last one wasn't a sexual thing you understand.
POTENTIAL RISK: He will probably kill the whole team. CHANCES OF SURVIVAL: 100%! The Joker survives everything. Especially death.
IN EVENT OF DEATH BEFORE MISSION... LIKELIHOOD OF REPLACEMENT WITH DEADPOOL:
Not happening. The Joker wouldn't die before a mission. He might fake his own death to escape having to go on a mission, but he certainly wouldn't die. As for replacing him with the wise-cracking Deadpool, it wouldn't work. No one replaces the Joker! No one! If the Joker ever heard that he was being replaced he'd kill his replacement, then he'd kill the person who suggested his replacement and then finally he'd kill some random stranger just for the hell of it. Don't ever suggest replacing him again!